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Finding the Fourth Proportional to 565,977.60, 781,044.72 and 311,323.20

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Solution

The fourth proportional to 565,977.60, 781,044.72 and 311,323.20 is: 429,623.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,977.60 : 781,044.72 = 311,323.20 : x
  2. Step 2: Convert to fraction form
    565,977.60/781,044.72 = 311,323.20/x
  3. Step 3: Cross multiply
    565,977.60x = 781,044.72 × 311,323.20
  4. Step 4: Simplify right side
    565,977.60x = 243,157,341,573.50
  5. Step 5: Solve for x
    x = 243,157,341,573.50/565,977.60
  6. Step 6: Final answer
    x = 429,623.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.